In a microwave-safe 1-quart bowl, combine the barley, bulgur, oats and 2/3 cup water. Microwave on high for 2 minutes. Stir in the raisins and cinnamon, and microwave 3 minutes longer. Stir, and then top with the walnuts. Serve the cereal with milk, if you like.
Nutritional information per serving: about 265 calories, 8 g protein, 50 g carbohydrate, 6 g total fat (1 g saturated), 7 g fiber, 0 mg cholesterol, 5 mg sodium